Ok, my 84 year old father who is in shape like a good 60 year old, but has metastatic prostate cancer to the bone taking monthly Firmagon and Bone strengthener, is doing well with PSA less than 1, but upper abdomen is distended and hard and looks like a basketball is in there. He claims there is no pain, it is not tender and he has no symptoms associated with it other than it is bothersome. Lab tests are normal. Like I said he works out everyday and usually had a six pack, so why would this be?